Rotary cutting device



Nov. 14, 1939.

K. w. HALLDEN 2,180,204

ROTARY CUTTING DEVICE Filed Nov. 27, 1937 s Sheets-Sheet 1 kycwfafl/far/ M Hal/den WZZomwys Nov. 14, 1939. K. w. HALLDEN ROTARY CUTTINGDEVICE I Filed Nov. 27, 1937'.

3 Sheets-Sheet 2 Nov. 14, 1939.

K. w. HA'LLDEN Filed Nov. 27, 1937 3 Sheets-Shget 3 Patented Nov. 14,1939 umrsc STATES ROTARY CUTTING DEVICE Karl W. Hallden, Thomaston,Conn, assignor to The Hallden Machine Company, Thomaston, Conn, acorporation of (Lonnecticutv Application November 2'7, 1937, Serial No.176,806

2 Claims.

This invention relates to improvements in rotary cutter devices, andmore particularly to the cutter construction thereof. 1

One object of this invention is to provide an improved rotary cutterconstruction employing improved means for holding the cutters in thecutter-carriers.

Another object of this invention is to provide an improved rotary cutterconstruction in which It? the cutters are reversible to employ either oftwo opposite cutting edges.

Another object of this invention is to provide an improved rotary cutterconstruction formed of simple elements readily manufactured and i5readily assembled to produce a rugged, durable mechanism.

With the above and other objects in view, as will appear to thoseskilled in the art from the resent disclosure, this invention includesall feagc tures in the said disclosure which are novel over the priorart.

In the accompanying drawings forming part of the present disclosure, inwhich one way of carrying out the invention is shown for illustrative g5purposes:

Fig. 1 is a front elevation partly in section illustrating oneembodiment of the invention in the form of a rotary cutting device;

Fig. 2 is a vertical sectional view on the line as 2-'-2 of Fig. l;

Fig. 3 1s a vertical sectional view on the line 3-3 of Fig. i;

Fig. 4 is a fragmental, longitudinal, vertical, sectional view on line5-5 of Fig. 2;

gs Fig. 5 is a broken perspective view of one of the shear-blades orknives;

Fig. 6 is a perspective view, partly broken away, of one of thehold-down clamps or locking-members; and

g Fig. '7 is a perspective view of one of the bladewedges.

In the description and claims, the various parts are identified byspecific names for convenience, but they are intended to be as genericin their 5 application as the prior art will permit.

Referring to the drawings, it is the base of a rotary cutting devicewhich may, for example, be of the type shown in my application SerialNo. 167,192. Mounted on the base it are bearing- 50 stands H and H2, inwhich are mounted upper and lower cutter-carriers or cutter-rolls l3 andit. The upper cutter-roll i3 is driven from the shaft 15 and by means ofa pair of gears it and I7 drives the lower cutter-roll I l.

55 Each cutter-roll has a longitu housing- "25 are located hold-downcap-screw,

recess l8 having opposed walls l9 and 20 converging toward one another.Mounted in the recess I8 of each of the cutter-carriers or rolls l3, I4is a shear-blade or knife 2| having oppo- I site parallel faces 22 and23, the face 23 being 5 provided with a hold-down or locking-recess 24.

A plurality of blade-wedges 25, 25 each have a face 25 adapted to engageagainst the face 20 of the housing=recess l8 and an opposite face 21adapted to engage against the face 23 of the shear-blade 2i. Each wedge2.5 is threadedly secured upon a bolt 28 and locked thereto by means of.a pin 29. Each bolt 28 extends through a hole 30 in the cutter-carrieror roll and is threadedly engaged with a nut Si in a recess 32. A splitlock-washer 33 may be engaged between the nut 3| and the bottom surface3% of a recess 32, and a cotter-pin or the like may extend through ahole in each bolt 28 and engage in one of the slots 350i the nut 35. Bytightening the nuts 3!, the wedges are drawn in firmly to wedge thelatter between the surface 2d of the recess 88 and the face 23 of theshear-blade ii to firmly force the face 22 of the blade it into firmfrictional engagement with the face it of the, recess it. 25

At suitable intervals between the blade-wedges clamps or lockingmembers36, each of which has a face 3'l adapted to engage against the wall 20of housing-recess I8, and a lug 38 having a shoulder 39 adapted toengage against one or the other of shoulders it of the recess M of theshear-blades 25. A set-screw M, preferably in the form of a hollowserves to draw down each of the hold-down clamps 36 to firmly hold downthe shear-blades againstthe bottom surface it ofthe housing-recess H8.The blade-wedges 25 have overhanging portions it which overlie thehold-down clamps 35 and thus serve as safety means to prevent thehold-down clamps from 40 coming out or being removed prior to'theremoval of the blade-wedges 25, although the space it between each twoadjacent overhanging portions &3 is suflicient to permit of introducinga wrench into the wrench-opening in each cap: 45 screw it to loosen ortighten the latter.

It will be observed that the shear-blades 2i have two opposite cuttingedges 64, either of which may be brought into cutting position byremoving the shear-blades and reversing their positions in thehousing-recesses i8, and then firmly securing them in their reversedpositions.

The invention may be carried out in other specific ways than that hereinset forth without .departing from the spirit and essentialcharacteristics of the invention, and the present embodiment is,therefore, to be considered in all respects as illustrative and notrestrictive, and all changes coming within the meaning and equivalencyrange of the appended claims are intended to be embraced therein.

I claim:

1. A rotary cutter construction comprising: a rotary cutter-carrierprovided with a housingrecess having opposed walls converging toward oneanother; a reversible cutter having opposite cutting-edges and mountedin said housingrecess and having opposite parallel faces, one of whichcutter-faces engages against one of said housing-recess walls;wedge-means in said housing recess between said cutter and thehousingrecess wall remote from said cutter and adapted to engage theadjacent of said parallel cutterfaces and force the other of saidparallel cutterfaces into frictional engagement with the adjacenthousing-recess wall; and locking-means in said housing-recess andextending in the same general direction as said one cutter-face andanchored below the innermost end of said cutter for locking said cutteragainst movement out of said housing-recess, said wedge-means overlyingthe outer end of said locking-means to prevent removal of saidlocking-means prior toremoval of said wedge-means.

2. A rotary cutter construction comprising: a rotarycutter-carrierprovided with a housingrecess having opposed walls converging toward oneanother; a reversible cutter having opposite cutting-edges and mountedin said housingrecess and having opposite parallel faces, one of whichcutter-faces engages against one of said housing-recess walls and theother of which has a locking-recess; wedge-means in said housingrecessbetween said cutter and the housingrecess wall remote from said cutterand adapted to engage between the latter wall and the adjacent of saidparallel cutter-faces to force the engagement with the adiacenthousing-recess wall; and locking-means in said housing-recess andextending in the same general direction as said one cutter-face andanchored below the innermost end of said cutter and engaging in saidlocking-recess for locking said cutter against movement out of saidhousing-recess.

KARL W. HALLDEN.

other of said parallel cutter-faces into frictional

